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subnuclear particle

[suhb-noo-klee-er, -nyoo- or, by metathesis, -kyuh-ler] /sʌbˈnu kli ər, -ˈnyu- or, by metathesis, -kyə lər/
noun, Physics.
any of the elementary particles, including those that do not exist in stable matter but appear as a result of high-energy collisions of other particles or nuclei.
Origin of subnuclear particle
First recorded in 1960-65; sub- + nuclear
Pronunciation note
See nuclear. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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